Q1.
If a train travelling at 72 km/h is to be brought to rest in a distance of 200 m, then its retardation
should be :
(1) 20 m/s2 (2) 2 m/s2 (3) 10 m/s2 (4) 1 m/s2
Q2. A car moving with a speed of 40 km/h can be stopped by applying brakes after at least 2m. If the
same car is moving with a speed of 80 km/h., what is the minimum stopping distance ?
(1) 2 m (2) 4 m (3) 6 m (4) 8 m
Q3. A car moving with a velocity of 10 m/s can be stopped by the application of a constant force F in
a distance of 20m. If the velocity of the car is 30 m/s. It can be stopped by this force in :
(1) 20/3m (2) 20 m (3) 60 m (4) 180 m
Q4. If a car at rest accelerates uniformly and attains a speed of 72 km/h in 10s, then it covers a
distance of
(1) 50 m (2) 100 m (3) 200 m (4) 400 m
Q5. A stone is dropped into a well in which the level of water is h below the top of the well. If v is
velocity of sound, the time T after which the splash is heard is given by.
(1) T = 2h/v (2) T = √2h/g+ h/v
(3) T = √2h/v+ h/g (4) T = √h/2g+2h/v
Q6. A stone thrown upwards with a speed 'u' from the top of the tower reaches the ground with a
velocity '3u'. The height of the tower is :
(1) 3u 2/g (2) 4 u 2/g (3) 6 u 2/g (4) 9 u 2/g
Q7. A stone falls from a balloon that is descending at a uniform rate of 12 ms -1. The displacement of
the stone from the point of release after 10 seconds is : (g = 9.8 m/s2)
(1) 490 m (2) 510 m
(3) 610 m (4) 725 m
Q8. A rocket is fired vertically from the ground. It moves upwards with a constant acceleration of 10
m/s2. After 30 seconds the fuel is finished. After what time from the instant of firing the rocket will it
attain the maximum height ? g = 10 m/s2 :
(1) 30 s (2) 45 s (3) 60s (4) 75 s
Q9. Four persons P, Q, R and S of same mass travel with same speed u along a square of side 'd' such
that each one always faces the other. After what time will they meet each other ?
(1) d /u (2) 2d /3u
(3) 2d /u (4) d √3u
Q10. Six persons of same mass travel with same speed u along a regular hexagon of side 'd' such that
each one always faces the other. After how what will they meet each other ?
(1) d /u (2) 2d /3u
(3) 2d /u (4) d √3u
Q11. A person walks up a stalled escalator in 90 sec. He is carried in 60s, when standing on the same
escalator which is now moving. The time he would take to walk up the moving escalator will be :–
(1) 27 s (2) 72 s
(3) 18 s (4) 36 s
Q12. A jet air plane travelling with a speed of 500 km/h ejects its products of combustion with a
speed of 1500 km/h relative to the jet plane. The speed of the latter with respect to an observer on
the ground is :–
(1) 1500 km/h (2) 2000 km/h
(3) 1000 km/h (4) 500 km/h
Q13. A train of 150 m length is running towards north at a speed of 10 m/s. A parrot flies at a speed
of 5 m/s towards south parallel to the railway track. The time taken by the parrot to cross the train is
equal to :–
(1) 12 s (2) 8 s
(3) 15 s (4) 10 s
Q14. Two trains each 50m long, are travelling in opposite directions with respective velocities 10 m/s
and 15 m/s. The time of crossing is :–
(1) 2 s (2) 4 s
(3) 2 √3s (4) 4 √3s
Q15. Two cars are moving in the same direction with the same speed of 30 km/h. They are separated
by 5 km. What is the speed of a car moving in the opposite direction if it meets the two cars at an
interval of 4 minute ?
(1) 45 km/h (2) 60 km/h
(3) 105 km/h (4) None
Q16. A stone is thrown upwards and it rises to a height of 200 m. The relative velocity of the stone
with respect to the earth will be maximum at :–
(1) Height of 100 m (2) Height of 150 m
(3) Highest point (4) The ground
